Crossword Genius

Cutting account identification (4)

Ross

I believe the answer is:

acid

'cutting' is the definition.
(I've seen this before)

'account identification' is the wordplay.
'account' becomes 'ac' (abbreviation).
'identification' becomes 'ID' (abbreviation).
'ac'+'id'='ACID'

(Other definitions for acid that I've seen before include "bad rain" , "Substance with pH of less than 7" , "It is neutralised by alkali" , "It turns litmus paper red" , "Bitter; biting" .)

I've seen this clue in The Times.
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